Make Mango Fruit Leather in a Dehydrator or Oven (Tested Recipe)
When mango trees around the island all drop their fruit at once, there’s only so much you can eat fresh. Fruit leather is one of the easiest ways to keep some: purée the fruit, spread it thin, and dry it slowly until it peels off like a sheet of leather. This guide follows the National Center for Home Food Preservation (NCHFP) tested mango leather recipe, so every amount, temperature and time below comes from that source.
Warnings
CriticalDrying only works if the temperature and airflow are right. NCHFP dries fruit leather at 140°F. Many ovens can’t hold a setting that low, and NCHFP says an oven that can’t may not be suitable for drying food. Check the air temperature with a thermometer rather than trusting the dial. Fruit leather is a short-term pantry food: NCHFP gives about 1 month at room temperature and up to 1 year in the freezer.
This is a kitchen guide, not professional food-safety advice. It sticks to the NCHFP tested recipe; if you change the fruit, thickness or drying method, the times below no longer apply. If anything smells off or shows mold, throw it out.
What You Need
- About 4 large mangoes (NCHFP’s recipe: enough for 4 cups of purée).
- Optional: 1 cup honey plus ½ tsp ground cinnamon, ¼ tsp nutmeg and ¼ tsp cloves (the recipe’s spices). Honey can be left out for unsweetened leather.
- Optional: ¼ tsp (750 mg) ascorbic acid powder for a lighter color.
- A blender and a food mill or fine sieve to remove fiber.
- An electric dehydrator with fruit roll liners (most reliable), or an oven that holds 140–145°F and rimmed cookie sheets (13" x 15" or 12" x 17").
- A thermometer to check the drying air temperature.
- Vegetable oil cooking spray or plastic wrap. Not waxed paper or aluminum foil.
- Plastic wrap and freezer bags or airtight containers for storage.
Check heat → purée → flavor → spread → dry → test → roll → store
Step 1: Check that your dryer can hold 140°F
Preheat the dehydrator to 140°F and put a thermometer on a tray. For an oven, set the lowest setting, prop the door open about 2 to 6 inches, and check that the air stays around 140°F. NCHFP says the oven should be able to hold 140 to 145°F; if yours runs hotter, it may need to be switched off and on again during drying.
NCHFP notes that electric dehydrators give the most reliable results.
Step 2: Peel, chop and purée the mangoes
Wash and peel the mangoes, cut the flesh off the seed in rough chunks, and blend until smooth. Push the purée through a food mill or sieve and throw away the coarse fiber. You want about 4 cups of smooth purée.
Step 3: Flavor it (or don’t)
For NCHFP’s version, stir in 1 cup honey, ½ tsp cinnamon, ¼ tsp nutmeg and ¼ tsp cloves. For unsweetened leather, leave out the honey. For a lighter color, mix in ¼ tsp (750 mg) ascorbic acid with the spices.
Want a different twist? NCHFP’s general fruit leather guide lists lime juice and lime peel among its flavorings, starting with ⅛ to ¼ tsp per 2 cups of purée.
Step 4: Prepare the trays
Lightly spray the dehydrator’s fruit roll liners with vegetable oil cooking spray. For an oven, line rimmed cookie sheets with plastic wrap, smoothing out the wrinkles, or spray them. NCHFP specifically says do not use waxed paper or aluminum foil.
Step 5: Spread it evenly, ¼ inch thick
Spread the purée evenly to about ¼ inch thick, which is the thickness in the mango recipe. Keep it back from the edges of the pan. An even layer matters: thin spots over-dry while thick spots stay sticky.
NCHFP’s recipe makes about two 14-inch dehydrator trays.
Step 6: Dry it at 140°F, about 10 hours
Dry continuously, keeping the air at 140°F. In a dehydrator, the recipe takes about 10 hours, and NCHFP says this depends heavily on the humidity of the room. In an oven, a big sheet can take longer; start checking at 8 to 10 hours.
Check the thermometer from time to time. Leather dries from the edges toward the center.
Step 7: Test for dryness
Touch the leather gently in several places near the center. It’s done when no indentation is left and there are no sticky areas. If the middle is still tacky, keep drying and check again.
Step 8: Peel, cut and roll while warm
Peel the leather off the tray while it’s still warm. If it cools and gets stubborn, warm it in the dryer for a moment. Cut each sheet into quarters, lay each piece on plastic wrap 1 to 2 inches longer than the leather at each end, and roll them up together. When they’re cool, twist the ends of the wrap tight.
Step 9: Store it and label the date
Put the rolls in freezer-quality zip bags or an airtight container and keep them in a cool, dark, dry place for up to about 1 month. For longer storage, freeze the tightly wrapped rolls for up to 1 year. Write the date on the bag.
Tips
FAQ
Can I dry it in the sun on the lanai instead?
NCHFP gives 1 to 2 days for fruit leather dried in the sun, but sun drying needs a minimum temperature of 85°F and does best with humidity below 60%, and the food must be covered or brought inside at night. If your air is humid or the weather changes quickly, a dehydrator is much more dependable. NCHFP does not recommend drying meats or vegetables outdoors.
The recipe says unripe mangoes. Is that right?
That’s what NCHFP’s tested mango leather recipe specifies (“about 4 large, unripe mangoes”). Its general fruit leather guide, for fruit in general, says ripe or slightly overripe fruit. If you use riper mangoes, expect the flavor and texture to differ.
Why not waxed paper or foil?
NCHFP says not to use either one for fruit leather. Use oiled fruit roll liners or plastic wrap.
It’s been 10 hours and the middle is still sticky.
Keep drying. The 10 hours is approximate and depends on humidity, thickness and your dryer. Check the air temperature is really 140°F, then test again every hour or so.
Can I add lilikoʻi or other flavors?
NCHFP lists specific spices, flavorings and additions for fruit leather, such as lime juice, orange juice and shredded coconut. Lilikoʻi isn’t on that list, so this guide doesn’t give an amount for it.
How long does it really keep?
NCHFP gives about 1 month at room temperature in a sealed container in a cool, dark, dry place, and up to 1 year in the freezer.